Thermo-oxidative pretreatment of municipal waste activated sludge for volatile sulfur compounds removal and enhanced anaerobic digestion / Bipro Ranjan Dhar in Chemical engineering journal, Vol. 174 N° 1 (Octobre 2011)  

Public ISBD [article]  inChemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 166–174 Titre : Thermo-oxidative pretreatment of municipal waste activated sludge for volatile sulfur compounds removal and enhanced anaerobic digestion Type de document : texte imprimé Auteurs : Bipro Ranjan Dhar, Auteur ; Elsayed Elbeshbishy, Auteur ; Hisham Hafez, Auteur Année de publication : 2012 Article en page(s) : pp. 166–174 Note générale : Génie chimique Langues : Anglais (eng) Mots-clés : Anaerobic digestion Hydrogen sulfide Waste activated sludge Thermo-oxidative pretreatment Volatile sulfur compounds Résumé : Thermo-oxidative pretreatment of municipal waste activated sludge was conducted using thermal pretreatment at 60 °C in presence of 0.6 mg H2O2 + 1.5 mg FeCl2/mg S2− as oxidants with the objective of achieving sludge disintegration for enhancing anaerobic digestion as well as to remove volatile sulfur compounds generation potential in biogas in continuous anaerobic digestion. For the pretreated feed digester, the hydrogen sulfide (H2S) and dimethyl sulfide (DMS) concentrations in biogas significantly decreased by an average of 75%, and 40%, respectively, while methanethiol (MT) removal efficiency was statistically insignificant compared to the control digester. Compared to the control, overall TSS and VSS removal efficiency were 10% and 11% higher for the pretreated feed digester operated at 10 days solid residence time (SRT), and methane production rate (L CH4/Day) increased by ∼20%. The simulation results using BioWin® suggest that the thermo-oxidative pretreatment has significantly increased the hydrolysis rate by 30% with higher methane production rate compared to the control digester. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S138589471101028X [article] Thermo-oxidative pretreatment of municipal waste activated sludge for volatile sulfur compounds removal and enhanced anaerobic digestion [texte imprimé] / Bipro Ranjan Dhar, Auteur ; Elsayed Elbeshbishy, Auteur ; Hisham Hafez, Auteur . - 2012 . - pp. 166–174. Génie chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 174 N° 1 (Octobre 2011) . - pp. 166–174 Mots-clés : Anaerobic digestion Hydrogen sulfide Waste activated sludge Thermo-oxidative pretreatment Volatile sulfur compounds Résumé : Thermo-oxidative pretreatment of municipal waste activated sludge was conducted using thermal pretreatment at 60 °C in presence of 0.6 mg H2O2 + 1.5 mg FeCl2/mg S2− as oxidants with the objective of achieving sludge disintegration for enhancing anaerobic digestion as well as to remove volatile sulfur compounds generation potential in biogas in continuous anaerobic digestion. For the pretreated feed digester, the hydrogen sulfide (H2S) and dimethyl sulfide (DMS) concentrations in biogas significantly decreased by an average of 75%, and 40%, respectively, while methanethiol (MT) removal efficiency was statistically insignificant compared to the control digester. Compared to the control, overall TSS and VSS removal efficiency were 10% and 11% higher for the pretreated feed digester operated at 10 days solid residence time (SRT), and methane production rate (L CH4/Day) increased by ∼20%. The simulation results using BioWin® suggest that the thermo-oxidative pretreatment has significantly increased the hydrolysis rate by 30% with higher methane production rate compared to the control digester. ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science/article/pii/S138589471101028X

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